User Guide

Editing Font Metrics
413
The Measurement Line
To activate the measurement line, click on this button: . You will see a
red line appear in the editing area:
When the measurement line is active (and visible), the glyph sidebearings
are measured not from the extreme points of the character, but from the
point of intersection of the measurement line and the contour:
Standard right sidebearing
Right sidebearing along the
measurement line
The measurement line is very useful when you are setting metrics in a serif
font – usually serifs are ignored when sidebearings are calculated and the
measurement line gives you a natural way to do that.